Top 80+ Solved Antennas and Microwave Engineering MCQ Questions Answer
Q. The major drawback of frequency multipliers is that they have:
a. higher attenuation
b. complex construction methods
c. complex design
d. none of the mentioned
Q. If the power input to an antenna is 100 mW and if the radiated power is measured to be 90 mW, then the efficiency of the antenna is:
a. 75 %
b. 80 %
c. 90 %
d. insufficient data
Q. If an antenna has a directivity of 16 and radiation efficiency of 0.9, then the gain of the antenna is:
a. 16.2
b. 14.8
c. 12.5
d. 19.3
Q. A dipole antenna is also called as?
a. marconi antenna
b. yagi antenna
c. bidirectional antenna
d. hertz antenna
Q. The impedance at the center of the antenna is known as?
a. characteristic impedance
b. radiation resistance
c. transmission impedance
d. recovery resistance
Q. What happens when the radiation resistance of the antenna matches the characteristic impedance of the transmission line?
a. no transmission occurs
b. no reception occurs
c. swr is maximum
d. swr is minimum
Q. The type of dipole antenna that has a higher band width is called as?
a. conical antenna
b. yagi antenna
c. helical antenna
d. marconi antenna
Q. The radiation pattern of a half-wave dipole has the shape of a
a. doughnut
b. sphere
c. hemisphere
d. circular
Q. What does the beam width of an antenna tell us?
a. signal strength
b. signal power
c. directivity
d. degradation
Q. What is the power radiated by the antenna with gain called as?
a. critical power
b. transverse power
c. effective radiated power
d. transmitted power
Q. What is the radiation pattern of an isotropic radiator?
a. doughnut
b. sphere
c. hemisphere
d. circular
Q. Which of the following antennas produce a vertical radiation pattern?
a. dipole antenna
b. yagi antenna
c. marconi antenna
d. hertz antenna
Q. The members of the antenna family which are made of wires of certain value in terms of operating wavelength are called:
a. loop antennas
b. wire antennas
c. dipole antenna
d. slot antennas